#!/bin/sh
# Copyright (C) 1994-2021 Altair Engineering, Inc.
# For more information, contact Altair at www.altair.com.
#
# This file is part of both the OpenPBS software ("OpenPBS")
# and the PBS Professional ("PBS Pro") software.
#
# Open Source License Information:
#
# OpenPBS is free software. You can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# OpenPBS is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public
# License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Commercial License Information:
#
# PBS Pro is commercially licensed software that shares a common core with
# the OpenPBS software.  For a copy of the commercial license terms and
# conditions, go to: (http://www.pbspro.com/agreement.html) or contact the
# Altair Legal Department.
#
# Altair's dual-license business model allows companies, individuals, and
# organizations to create proprietary derivative works of OpenPBS and
# distribute them - whether embedded or bundled with other software -
# under a commercial license agreement.
#
# Use of Altair's trademarks, including but not limited to "PBS™",
# "OpenPBS®", "PBS Professional®", and "PBS Pro™" and Altair's logos is
# subject to Altair's trademark licensing policies.

#

if [ $# -eq 1 ] && [ $1 = "--version" ]; then
   echo pbs_version = @PBS_VERSION@
   exit 0
fi

mpirun="mpirun"
name=`basename $0`

export PBS_RSHCOMMAND=${P4_RSHCOMMAND:-rsh}
. ${PBS_CONF_FILE:-@PBS_CONF_FILE@}
export P4_RSHCOMMAND=${PBS_EXEC}/bin/pbs_remsh
export MPICH_PROCESS_GROUP=no
export PBS_TMPDIR="${PBS_TMPDIR:-${TMPDIR:-/var/tmp}}"

if [ "${PBS_NODEFILE:-XX}" = "XX" ]; then
	if [ "$name" != "mpirun" ]; then
		echo "$name: Warning, not running under PBS"
	fi
	$mpirun $*
	exit $?
fi

list=""
usernp=`cat ${PBS_NODEFILE} | wc -l`

while [ $# -gt 0 ]; do
	if [ "XX$1" = "XX-np" ]; then
		shift
		usernp=$1
	elif [ "XX$1" = "XX-machinefile" ]; then
		shift
		echo "$name: Warning, -machinefile value replaced by PBS"
	else
		list="$list $1"
	fi
	shift
done

machinefile="${PBS_TMPDIR}/pbs_mpimach$$"
cat -n ${PBS_NODEFILE} | \
	sort -k2 | uniq -f1 -c | \
	awk '{if ($1 == 1) print $2, $3; else print $2, $3 ":" $1}' | \
	sort -n | awk '{print $2}' > $machinefile


$mpirun -np $usernp -machinefile $machinefile $list
ret=$?

rm $machinefile
exit $ret
